I agree, drinking while armed is not a good plan. But it's just the tip of the iceburg. Choosing to be unarmed so one is free to exercise bad judgement in a room full of people more likely to exercise bad judgement doesn't seem like a winning self defense strategy to me.
I like the idea of staying in control of myself unless I'm at home, and I don't drink at home either, but that's just me.
Try not drinking a couple of times. You might be surprised at your reaction to the whole bar scene. There are a lot of things to do that are more fun than getting drunk. Drunks are awful company, they just don't know it.